When an I-485 is accepted at the Service Center, requests for FD-258 FBI fingerprint checks, fingerprint fees, and G-325A consular background checks are made by USCIS. Responses to these requests come back to USCIS and must be matched up with the appropriate files held in staging. File Maintenance "file connects" these responses to the corresponding files.
Here is another question from one of our clients posted in our extranet forclients.com.
Qo. My Priority date became current as per August bulletin.
I and my wife are applied for I-485 on July 2007 (PF is done and got EAD and AP docs). At that time my son was in India and i could not apply for him.
Right now i am working on his I-485 paperwork and targeting to send his application to INS/Nebraska on August first itself (through your Law firm).